Pyrantel can be bought over the counter. I have heard of people buying Valbazen (Albendazole)- best to use combinations of drugs with herbs in case there is Antibiotic resistance.
I removed roundworm using neem, boswellia, myrrh and oil of oregano enteric caps from NOW. There have been reports of Miracle-Mineral-Supplement killing flukes which people report as rolled up tomato skins, but I would read the safety issues of that before trying.
Magnesium and other electrolytes are the culprits in palpatations. These electrolytes get wasted in chronic stress situations due to adrenal excess. Magnesium comes in many different forms some of which are better than others. EmergenC has always done good things for me.